Leia fascipennis - <p>Photographed in the walled garden at Felbrigg Hall, Norfolk (TG193394) on 18 Sept 2014. Identified by Peter Chandler. Some larvae of this family of flies glow in the dark, but I'm not sure if that is the case with this species! </p> © Martin Cooper from Ipswich, UK - CC BY 2.0 - Wikimedia Commons